🔧 Power Up Your Projects with Precision! Seamlessly integrate into your smart home setup. E-Book included for a quick start! Switch higher voltages effortlessly. Perfect fit for any project, big or small. Transform your ideas into reality with ease! 5V Power E-Book Included AC Control The AZDelivery 3 x 1-Relay 5V KY-019 Module is a versatile and compact relay module designed for various projects, including IoT applications. It allows for the control of AC circuits and is compatible with Arduino and Raspberry Pi. The package includes an informative E-Book to guide users through setup and application examples.